Laser-induced fluorescent laser?

[Wallydraigle]

A while back I saw a video on youtube where this guy built a nitrogen laser, and then used that to make highlighter ink lase with a greenish yellow beam It was totally ghetto, but it turned out really awesome.

 

[drumz0rz]

This is the beam on the floor (time lapse)

And this is just the floor glowing (I pressed the host to the tile, you can see a little laser light leakage but the letters are the floor glowing not the laser)

 

[NoBama]

Just a few years ago $100 for a 5mW green was a good deal, if you could find it. Now they practically give 5mW ones away with cereal, and everybody and his uncle Bob has one at 100mW+. There might not have been a revolution in technology, but certainly there has been in accessibility.

i paid close to that for a red laser 15 or so yrs ago.